Effect Of Treatment Method, And Oil kind On Activation Of Alpha-cypermethrin Toxicity To Khapra Larvae (Trigoderma granarium E.)

Abstract

The results of studying the effect of treatment method, and oil kind on activation of Alpha- cypermethrin toxicity to khapra larvae revealed that treating the substrate with alpha- cypermethrin mixed separately with oils of sunflower, Sesame , Groundnut , Soybean and Almond in ration of 1:1 achieved the highest mean mortality percentage reached 63.15 % in comparison with 51.75 for surface treatment . The activation efficiency of mixture were varied according to the oil kind and treatment method , the highest activation and synergism percentage were obtained from treating the substrate with a mixture of Alpa- cypermethrin and Soybean oil reached 2.08 and 1.95 respectively however the mixture of Alpha- cypermethrin and Sunflower oil showed an antagonistic effect on toxicity of insecticide to the larvae on treated substrate